Clue
A Clue
noun
It was a hand which hangs the things we're looking for: a clue! Clues really are usually put down by people quite often. Or, perhaps, think of a hand hanging on something as your clue.
The reading is 手 plus 掛かる put together. Just watch out for that rendaku.
警察は消えたベーコンの謎について何か手掛かりを見つけましたか？
Have the police found any clues regarding the mystery of the vanishing bacon?